Improvement in stop-valves for steam and other enginery



s. J. FEET.

Stop Valve.-

No.*99,943. Patentedl Feb. 15, "1870.

Zees: f/agenfpw: g@ @/j/ drifted tetw s. J. rear, or New YORK, N. Y,

Letters Patent No. 99,943, dated February 15, 1870.

IMPROVEMENT 12N STOP-VALVES FDR STEAM AND QTHER ENG-INERY.

The Schedule referred to in these Letters Patent and making part of the same To all whom it may concern Be it known that I, S. J. PET, of the city, county,

and State of New York, have invented a new and usefnl Improvement in Stop-Valves; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference ,beingv had to the accompanying drawing forming part of this specification, in which- Figure 1 is a central section of a valve made according to my invention.

Filgure 2 is a transverse Vsection in the linea: a: of

'Similar letters indicate corresponding parts.

My invention ,relates to valves or cocks for steam, water, or other uids, wherein'the valve proper is composed'of independent parts or pieces, operated by a closing or lifting Wedge. arranged on the stem of the valve, as shown in my Letters Patent of the United States, No. 60,932, dated January 1, 1867.

In. my present improvements the same principle of coistruotion is applied to round valves and valve-seats, an

The improvements consist, among other things, in inclosing the divided valve with arubber ring or band; also, in tinning the surfaces of the valve and its shell to prevent injury to the metal from the action of sulphur contained in the rubber.

The letter A designates the shell of the valve, which may be-made of brass, iron, or other suitable material, of the shape of an inverted T, the ends being intended to connect with the pipes to which the valve is to be attached, the central part being closed by the cap B, the center of which is perforated and provided with a stnfiing-box in the usual manner, through which the vvalve-stem C is free to slide.

The valve proper is composed of two or more part-s, by whose separation or contraction the opening or closing thereof' iseifected. In this example I have made it of two'parts or halves, D D, -whieh separately have the general outline of semi-cylinders, and together form the general outline of a cylinder, each part D, at its ends, being provided with flanges E E, which serve to keep the rubber coat of the valve in place.

This coat is formed of a rubber ring or band, F, which embraces the divisions D D, and holds them together, forming the surface which closes or comes upon the valve-seats, and also operating as a spring'to contract the valve when the Vparts D D are relieved from the action ofthe wedge or cone G.

The lower or inner end of the lstem which carries the expanding wedge or cone is received between the divisions D D, which arehollowed out so as to form, when the divisions are brought together, a wedgeshaped or conical cavity, H, of similar form to the wedge G, the wedge being provided with a square shoulder, I, -that catches under corresponding projections in the divisions D, as shown in my pgevious patent.

That part of the stem which is inclosed by the divisions D D above the wedge or cone G is provided with a screw-thread, which engages with screwlthreads cut in' the said divisions, so that if, after the valve has been pushed down to its proper place in the shell,

the stem is then turned, the screw-threadsoause the wedge to enter further into the valve between said divisions and to separate them, thereby forcing them toward their seats. p

The bottom of the shell has a pyramidical projection, R, truncated, which rises from its center and enters a corresponding opening, J, with tapering sides made in the bottom of the valve, one-half thereof in each division, the arrangementvbeing such that ,the projection R acts both asa guide to the valve and as a-means of insuring its expanding at thebottom.

In order to preserve` the valve and shell and other parts from the injurious action of the sulphur in the rubber, I coat them with tin, and such coating can be renewed whenever it is found necessary.

' What I claim as new, and desire to secure by Let- I 1. Inclosing a valve, made of two or more separate divisions, by a rubber covering or ring, substantially as set forth.

2. Tinning the surfaces of the valve and shell which are exposed to the action of the sulphur of the rubber, substantially as and for the purposes described.

This specification signed' by me this 17th day of June, 1869.

S. J. FEET.

Witnesses:

G. Bonson, W. H. WATSON. 

